Additive Manufacturing


Organisation:
Lehrstuhl für Photonische Technologien

FAU Contact:
Scheitler, Christian Josef

Description:


The interdisciplinary research group is engaged in the laser based Additive Manufacturing of metal parts. The group deals with fundamental as well as industry specific application research projects in order to assure a comprehensive understanding.



Research in the group focuses on two processes, namely Laser Beam Melting in powder bed (LBM) and Laser Metal Deposition (LMD). Both are based on the principle of creating fully dense structures by melting metal powder layer by layer with a focused laser beam. However, in the case of LBM the powder is provided by a wiper whereas in the case of LMD it is injected by a powder nozzle. The LBM and LMD processes are unique with abilities such as fabrication of complex geometries (e. g. undercuts) and multi-material fabrication respectively.



Research at the group is integrated between process understanding, powder material and system technology (see figure). Along a completely implemented process chain (including powder analysis, data preparation and post-processing) in its own manufacturing laboratory, the research group deals with qualification and process parameter development of new metal based materials for laser based Additive Manufacturing processes. In order to realize the full capability of research, system technology development and modification is performed according to the requirements.



Within the fundamental research activities of LBM and LMD, physical understanding of the interaction between the powder material and the system technology is established to achieve the full potential of the technology.Based on the acquired fundamental knowledge, research is performed by the group to ensure development of industrial applications. At the same time, the intensive exchange with the industrial partners helps at defining goals of long-term relevance for fundamental research activities.



The research group is a member of the Joint Institute of Advanced Materials and Processes (ZMP). Above all, the group has access to the broad expertise in laser material processing which comes with its location at the Institute of Photonic Technologies.




Assigned publications

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Karg, M., Munk, A., Ahuja, B., Backer, M.V., Schmitt, J.P., Stengel, C.,... Schmidt, M. (2018). Expanding particle size distribution and morphology of aluminium-silicon powders for Laser Beam Melting by dry coating with silica nanoparticles. Journal of Materials Processing Technology, 264, 155-171. https://dx.doi.org/10.1016/j.jmatprotec.2018.08.045
Karg, M., Rasch, M., Schmidt, K., Spitzer, S., Karsten, T., Schlaug, D.,... Schmidt, M. (2018). Laser Alloying Advantages by Dry Coating Metallic Powder Mixtures with SiOx Nanoparticles. Nanomaterials, 8(10), 1-29. https://dx.doi.org/10.3390/nano8100862
Kolb, T., Gebhardt, P., Schmidt, O., Tremel, J., & Schmidt, M. (2018). Melt pool monitoring for laser beam melting of metals: assistance for material qualification for the stainless steel 1.4057. In 74 (pp. 116-121). Fürth.
Kolb, T., Müller, L., Tremel, J., & Schmidt, M. (2018). Melt pool monitoring for laser beam melting of metals: inline-evaluation and remelting of surfaces. In 74 (pp. 111-115).
Rausch, A., Markl, M., & Körner, C. (2018). Predictive simulation of process windows for powder bed fusion additive manufacturing: Influence of the powder size distribution. Computers & Mathematics With Applications. https://dx.doi.org/10.1016/j.camwa.2018.06.029
Gausemeier, J., Schmidt, M., Anderl, R., Schmid, H.-J., Leyens, C., Seliger, G.,... Karg, M. (2017). Additive Fertigung. München: acatech – Deutsche Akademie der Technikwissenschaften, Nationale Akademie der Wissenschaften.
Schmidt, M., Gausemeier, J., Leyens, C., Anderl, R., Winzer, P., Schmid, H.-J.,... Karg, M. (2017). Additive Manufacturing. München: acatech – Natonal Academy of Science and Engineering (lead insttuton) acatech Ofce: Karolinenplatz 4, 80333 München German Natonal Academy of Sciences Leopoldina Jägerberg 1, 06108 Halle (Saale) Union of the German Academies of Sciences and Humanites Geschwister-Scholl-Straße 2, 55131 Mainz.
Alexeev, I., Wu, J., Karg, M., Zalevsky, Z., & Schmidt, M. (2017). Determination of laser beam focus position based on secondary speckles pattern analysis. Applied Optics, 56(26), 7413-7418. https://dx.doi.org/10.1364/AO.56.007413
Karg, M., Ahuja, B., Wiesenmayer, S., Kuryntsev, S., & Schmidt, M. (2017). Effects of process conditions on mechanical behavior of aluminium wrought alloy EN AW-2219 (AlCu6Mn) additively manufactured by Laser Beam Melting in powder bed. Micromachines, 8(1), 1-11. https://dx.doi.org/10.3390/mi8010023
Ahuja, B., Schaub, A., Junker, D., Karg, M., Tenner, F., Plettke, R.,... Schmidt, M. (2016). A ROUND ROBIN STUDY FOR LASER BEAM MELTING IN METAL POWDER BED. South African Journal of Industrial Engineering, 27(2), 30-42. https://dx.doi.org/10.7166/27-2-1201

Last updated on 2019-16-03 at 23:02